WO2021042212A1 - Nanoparticules d'oxyde de calcium stabilisées par de la zircone pour la capture de co2 à des températures élevées - Google Patents

Nanoparticules d'oxyde de calcium stabilisées par de la zircone pour la capture de co2 à des températures élevées Download PDF

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WO2021042212A1
WO2021042212A1 PCT/CA2020/051199 CA2020051199W WO2021042212A1 WO 2021042212 A1 WO2021042212 A1 WO 2021042212A1 CA 2020051199 W CA2020051199 W CA 2020051199W WO 2021042212 A1 WO2021042212 A1 WO 2021042212A1
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zirconium
sorbent
calcium oxide
oxide nanoparticle
calcium
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PCT/CA2020/051199
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Davood Karami
Nader Mahinpey
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Uti Limited Partnership
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0211—Compounds of Ti, Zr, Hf
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B01J20/041—Oxides or hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28011—Other properties, e.g. density, crush strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28016—Particle form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28057—Surface area, e.g. B.E.T specific surface area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28069—Pore volume, e.g. total pore volume, mesopore volume, micropore volume
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/602—Oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/112—Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
    • B01D2253/1124—Metal oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/30—Physical properties of adsorbents
    • B01D2253/302—Dimensions
    • B01D2253/304—Linear dimensions, e.g. particle shape, diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/30—Physical properties of adsorbents
    • B01D2253/302—Dimensions
    • B01D2253/306—Surface area, e.g. BET-specific surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

Definitions

  • the invention is in the field of chemical and physical processes for the production and use of stabilized calcium oxide aerogel sorbents for CO2 capture at high temperature.
  • CO2 has extremely high thermal stability, and can be converted to value- added products by known processes or stored in underground fields.
  • the capture capacity of calcium oxide has been utilized for CO2 removal at high temperatures through carbonate formation.
  • the weak structure of calcium oxide is prone to sintering, thereby significantly decreasing capacity during extended cyclic performance.
  • Many approaches have been proposed to maintain this capacity for long periods of time, but problems remain.
  • FSP allows for the controlled synthesis of nanoparticles with high specific surface areas.
  • Ca-naphthenate precursor and the calculated refractory dopant precursor are dissolved in xylene and fed by a syringe pump through the spray nozzle.
  • the most stable sorbent (40 wt.% ZrO2-60 wt.% CaO) gives a CO2 capacity of 10.76 mole/kg in an extended cyclic operation of 50 without any activity loss. Carbonation was conducted at 700 °C in 30% C02 for 30 min.
  • US2010/0311577 describes a method for making inert nanoparticle- doped porous CaO sorbent by physically dry mixing and decomposing calcium acetate (Ca(CFl3COO)2) or calcium oxalate (CaC204) with inert nanoparticles, to form a nitrate-free mixture, and calcining this mixture to form a stable porous microstructure with CO2 sorbent properties.
  • the C02-capture performance of MgO- doped CaO (42 wt. % MgO-58 wt. % CaO) sorbents has been described as having a capacity of 8.5 mole/kg in a multicyclic operation of 100 without any activity loss.
  • Highly reactive nanosized calcium oxide particle compositions including compositions comprising materials that are oxides or hydroxides of the elements of groups IIA or the transition metals.
  • the materials may be intimately mixed on a nanosized scale.
  • Select compositions showed very small average particle sizes and consistently large surface areas.
  • Methods for the synthesis and fabrication of these compositions are provided, along with methods for the use of these compositions as sorbents.
  • nanosized zirconia-stabilized calcium oxide particle sorbents with a BET surface area on the order of 150 m 2 /g are disclosed.
  • Methods for preparing calcium hydroxide and oxide compositions are described herein and in CA3044223 (claiming priority to U.S. provisional Application No. 62/675,505, filed May 23, 2018).
  • Calcium oxide nanoparticles are synthesized in a high surface area alumina aerogel (2000 m 2 /g), as follows:
  • solid compositions may be prepared by mixing solid oxides and/or hydroxides with large surface areas. These compositions exhibited excellent performance in the high-temperature carbon capture process. These compositions may for example include materials selected from the oxides and/or hydroxides of elements of Groups IIA, IMA, and the transition metals.
  • the compositions used as base sorbents were synthesized by preparing calcium alkoxide slurries, which were then hydrolyzed to obtain an alcogel. The alcogel was first supercritically dried and then calcined at high temperature to yield calcium oxide.
  • the exemplified calcium oxide nanoparticles comprise a uniform dispersion of nanosized particles of calcium oxide, characterized as substantially fluffy clusters of particles, having a BET surface area in the range of 80 to 150 m 2 /g, a pore volume in the range of 0.5 to 2.5 cm 3 /g, and a bulk density in the range of 0.01 to 0.05 g/cm 3
  • Calcined calcium oxide was impregnated and/or core-shelled with an inorganic and organic metal precursor to exemplify alternative solid compositions. These compositions were used as sorbents for carbon dioxide capture from flue gases at high temperature.
  • Figure 1 is a graph showing the particle size distribution of Sample NC1 (average size, 27.5 nm).
  • Figure 2 is a graph showing the particle size distribution of NC1/10% Zr02 (average size, 348.5 nm).
  • Figure 3 is a graph showing thermogravimetric analysis (TGA) performance of NC1 sample at 675 °C (CO2 capture).
  • Figure 4 is a graph showing thermogravimetric analysis (TGA) performance of NC1/10% Zr02 sample at 675 °C (CO2 capture).
  • Figure 5 is a graph showing thermogravimetric analysis (TGA) performance of NC1/10% Zr02 -P123 sample at 675 °C (CO2 capture).
  • Methods are provided for preparing a series of calcium compounds, including nanoscale oxide and hydroxide particulates with very high surface areas.
  • calcium alkoxide solutions are prepared in a suitable solvent.
  • Calcium alkoxide may for example have the formula (RO)3Ca, where each R is a C1 -C2 straight chain alkyl group.
  • Exemplary alkoxides comprise methyl and ethyl groups.
  • the calcium alkoxide solution is then hydrolyzed to yield a calcium hydroxide alcogel. Thereafter, the alcogel is dried under supercritical conditions, at a temperature over the supercritical point of the solvent, to yield a calcium hydroxide nanoparticle.
  • Supercritical drying may for example be carried out for a period of from 1 .5-3.5 hours.
  • the calcium hydroxide nanoparticles may in turn be subject to thermal dehydration, to provide a dehydrated calcium oxide nanoparticle comprising calcium hydroxide.
  • the thermal dehydration may for example be carried out at a temperature of 300-500° C, for example for a period of 1-3 hours under vacuum.
  • the nanosized calcium hydroxide prepared in this way has a high BET surface area, in some embodiments of at least 140 m 2 /g.
  • the dried or dehydrated nanoparticle compositions may be used as sorbents, for example for chemical adsorption of gases.
  • the dehydrated nanoparticles may be calcined to provide particulate calcium oxide compositions.
  • the calcination may for example be performed at a temperature of 750-850° C for a period of 2-5 hours.
  • the nanosized calcium oxide prepared in this way has a higher BET surface area, in some embodiments of at least 20 m 2 /g compared with a commercial calcium oxide with BET surface area less than 1 m 2 /g.
  • compositions provided by the foregoing methods may be used as solid sorbents, for example for the removal of target materials through physisorption or chemisorption.
  • Exemplified processes of this kind involve contacting the selected compositions with target materials such as CO2 and SO2 (exemplary of flue gases containing CO2).
  • target materials such as CO2 and SO2 (exemplary of flue gases containing CO2).
  • SO2 exemplary of flue gases containing CO2
  • nanoparticles-derived compositions with high surface areas calcined at high temperatures have sufficient surface and stability to provide solid sorbents as part of the calcium-looping process.
  • the following examples describe select compositions and methods, illustrating only select aspects of the present innovation.
  • This step comprises the hydrolysis of a calcium alkoxide solution (Ca(RO)3 + alcohol + co-solvent).
  • the chemicals used in the synthesis were directly obtained from a commercial source without further purification.
  • Calcium methoxide (Aldrich) was added to a 500 ml beaker to prepare 10% wt. calcium methoxide slurry in methanol (Aldrich).
  • the Ca(CH30)2 slurry was dispersed in a solution of toluene co solvent (Aldrich) (Vol. of tolueneA/ol. of methanol of 5-8) to form a grey slurry.
  • the step of admixing zirconia stabilizer comprises of adding the specific amounts of zirconium precursors (depending on zirconia percentages in the final sorbents) such as ethanolic zirconium tetra-butoxide solution to calcium alkoxide solution prior to hydrolysis step.
  • the hydroxide alcogel was transferred to a 100 ml glass liner of a Parr high-pressure batch reactor.
  • the reactor was first flushed with nitrogen and then pressurized to 200-250 Psi with nitrogen.
  • the reactor was slowly heated without stirring from room temperature to 250-270°C for a period of 1-3 hours.
  • the pressure was increased from 200-250 Psi to 600-800 Psi.
  • the reactor reached the target temperature, it was kept at that temperature for a while and then flashed to the atmosphere quickly to remove the solvent vapors. Afterward, the heating jacket was removed, and the reactor was flushed with nitrogen for 5 minutes to remove the remaining solvent vapors. The reactor was then allowed to cool down to the room temperature.
  • thermogravimetric analysis confirmed that calcium hydroxide lost the highest weight at a temperature of 400-450°C to convert to dehydrated calcium oxide.
  • the fluffy white calcium hydroxide powder was placed into a BET tube connected to a degassing vacuum line of the BET instrument. The tube was evacuated at room temperature for a while to 10 pHg vacuum. Afterward, the tube was slowly heated from room temperature to 400-450°C at a ramp of 10°C/min under dynamic vacuum. After the heat treatment was complete, the degassing line was turned off and the tube cooled down to room temperature under dynamic vacuum. After this step, the dehydrated calcium oxide had a light white color.
  • sample NC1 was subjected to a dynamic vacuum using the BET instrument degassing port at 450°C.
  • the BET surface area without vacuum dehydration measured 117 m 2 /g as shown in Table 1 .
  • the surface area was highest (140 m 2 /g). The significant decrease in surface areas at temperatures above 500°C can be explained by sintering.
  • BET Brunauer-Emmett-Teller
  • the samples were placed in a crucible and heated at a rate of 40 min from room temperature to 850°C.
  • the instrument used was a thermogravimetric analyzer, the TGA-STA-6000 from the PerkinElmer Company.
  • the Malvern zetasizer (nano-series, Nano-ZS) dynamic light scattering (DLS) instrument was used to measure the size of alumina aerogel particles. This instrument uses a 633 nm wavelength laser through which the sample particles scattered light in all directions, including towards a detector. The change in the movement of the particle and a correlation function were used in the software (version 7.12) to draw size distribution graphs.
  • Samples NC1 and NC1/10% ZrC in which calcium tri-methoxide and zirconium tetra-butoxide were used as the starting material, exhibited the highest surface areas. In order to obtain samples with the highest surface areas, sufficient co solvent/solvent ratios are required to be provided for the solutions.
  • the ratios of alcoholic solvent (e.g. methanol) to aromatic co-solvent (e.g. toluene) were varied and found to have an effect on the surface area. This ratio was over 5 for samples samples NC1 and NC1/10% Zr02, and below 3 for samples NC2 and NC2/10% Zr02 which resulted in lower surface areas.
  • the main difference among the samples prepared by the same alcohol was the ageing time and the toluene/alcohol ratio. It was found that changing the solvent resulted in reducing the surface area by half. The other important factor that affected the performance of the samples was storage time. A long storage time resulted in the degradation of the fresh sample due to the very reactive surface triggering the particle growth and strong adsorption of gases. The surface area of sample NC1 decreased from 116 to 75 m 2 /g after one week of storage. Therefore, to avoid the effects of this instability, a fresh sample obtained immediately after the supercritical drying process may beneficially be thermally converted to more stable phases.
  • the prepared calcium oxide aerogel was used for high- temperature CO2 capture from flue gases, and embodiments were exemplified that used zirconia (Zr02) stabilized calcium oxide CaO for high-temperature CO2 capture.
  • Zr02 zirconia
  • This sorbent adsorbs CO2 at 650-700 °C by the following reaction to form CaC03: CaO + CO2 ⁇ ® CaC03 (1 ).
  • the C02-capture efficiency of 10%-20% CaO- stabilized zirconia was illustrated using various preparation methods such as: (1 ) mixing stabilizer precursor during alcogel preparation, (2) incipient wetness impregnation (IWI, also called capillary impregnation or dry impregnation) of nanoparticles with stabilizer precursor solution, comprises of zirconium oxynitrate dissolved in sufficient amount of water which only covers the particles pores and surfaces.
  • IWI incipient wetness impregnation
  • the partially wet particles are dried and (3) shelling the nanoparticles or calcined nanoparticles surface by the core-shell method using two types of surfactants, P123 and TMA, comprises of an ethanolic zirconium precursor solution containing zirconium tetra-butoxide, acetylacetone, surfactant and water is used for shelling. Nanoparticles are dipped in this solution several times, between each dip, nanoparticles are dried.
  • All sorbents were tested at a carbonation temperature of 675°C and decarbonation temperature of 850°C.
  • the exemplary CaO sorbent showed high reactivity compared to other calcium-based sorbents tested at the higher calcination temperature of 850°C.
  • the sorbent fabricated by mixing zirconia precursor (zirconium n-butoxide) with calcium hydroxide alcogel solution with a surface area of 190 m 2 /g showed the highest C02-capture efficiency and stability compared with the other fabricated sorbents by different preparation methods.
  • the pure CaO sorbent prepared by the same sol-gel method with a surface area of 140 m 2 /g showed the lowest CO2- capture stability due to having a high sintering characteristic. Higher sintering of the sorbent resulted in converting the particulate-active CaO precursor to an agglomerated inactive precursor of CaC03 that cannot be completely regenerated at the selected calcination conditions.
  • the zirconia-stabilized calcium oxide sorbent (sample NC1 ) provided higher surface area to disperse the active component (zirconium) on the surface more effectively. These results explain that the highest C02-capture efficiency and stability (less activity loss) was displayed by the 10% Zr02 stabilized CaO. Results are shown in Table 2.
  • the pelleting of samples at a size of 1 mil using the Parr pellet press (up to 1000kg. total force can be exerted on the punch) decreases the activity to 10-15% due to the gas diffusion barrier.
  • Figures 4,5 and 6 show the cyclic operations of three sorbents NC1 , NC1/10% Zr02 and NC1/10% Zr02 (P123). As can be seen in Figure 5, the stabilized sorbent remained stable after 20 carbonation/calcination cycles. Table 2. Result of CO2 capture performance of the prepared sorbents

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  • Chemical Kinetics & Catalysis (AREA)
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  • Engineering & Computer Science (AREA)
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  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

L'invention fournit des compositions de particules d'oxyde de calcium nanométriques hautement réactives, comprenant des compositions d'oxyde de calcium ayant une surface BET de 200 m2/g. Des sorbants d'oxyde de calcium stabilisés comprenant un matériau qui est constitué d'oxydes métalliques sont également divulgués. Des procédés de synthèse et de fabrication de ces compositions, ainsi que des procédés d'utilisation de ces compositions en tant que sorbants, sont fournis.
PCT/CA2020/051199 2019-09-06 2020-09-03 Nanoparticules d'oxyde de calcium stabilisées par de la zircone pour la capture de co2 à des températures élevées WO2021042212A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113648826A (zh) * 2021-08-20 2021-11-16 山东大学 一种基于钙循环的协同脱除co2和no的方法
CN114804178A (zh) * 2022-05-19 2022-07-29 广西民泰纳米科技有限公司 一种聚酯族降解塑料专用纳米碳酸钙的制备方法
CN114917863A (zh) * 2022-04-24 2022-08-19 西安工业大学 一种多巴胺包覆的纳米氢氧化钙及其制备方法

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WO2009144472A2 (fr) * 2008-05-29 2009-12-03 Ntnu Technology Transfer As Accepteurs de dioxyde de carbone
US20100139486A1 (en) * 2008-12-10 2010-06-10 University Of Cincinnati Sulfur Tolerant Highly Durable CO2 Sorbents
US20130247757A1 (en) * 2012-03-26 2013-09-26 Samsung Electronics Co., Ltd. Adsorbent for carbon dioxide, method of preparing the same, and capture module for carbon dioxide including the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009144472A2 (fr) * 2008-05-29 2009-12-03 Ntnu Technology Transfer As Accepteurs de dioxyde de carbone
US20100139486A1 (en) * 2008-12-10 2010-06-10 University Of Cincinnati Sulfur Tolerant Highly Durable CO2 Sorbents
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CN114804178A (zh) * 2022-05-19 2022-07-29 广西民泰纳米科技有限公司 一种聚酯族降解塑料专用纳米碳酸钙的制备方法
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